https://fr.m.wikipedia.org/wiki/Fleur_de_lys
It first appeared in the 8th century in the Frankish empire and it was adopted as a specific symbol of french royalty in the 12th century. In France it only went out of use somewhat after the french revolution in 1789, so more than a century after Quebec was conquered by England, which means that Quebec was colonized by the french when the fleur de lys was still in wide use.
The people who vote for her seem like the useful idiots to me, she herself more seems like a traitor to the old values of her country and the purported causes of her party. She loves foreign autocrat dictatorships and there's nothing green about helping republicans win elections.